Return Loss Enhancement of Patch Antenna

In this paper, the authors have discussed and analyzed the performance of microstrip patch antenna with and without using the metamaterial structure. The return loss of a normal patch antenna designed at the resonant frequency of 2GHz has been compared with that of the same patch antenna along with an additionally stacked metamaterial structure on to the patch antenna at a height of 3.2mm from the ground plane. It has been revealed that there is an improvement in return loss of around 6dB.